Rotary cutting apparatus



Oct. 27, l931. Q G, OLSON ROTARY CUTTING APPARATUS Filed Feb. 14, 1928 4 Sheets-Sheet l 27, 11931. C, G, QLSQN 1,829,532

ROTARY CUTTING APPARATUS Filed Feb. 14, 1928 4 Sheets-Sheet 2 Oct. 27, 1931. c. G. OLSON ROTARY CUTTING APPARATUS Filed Feb. 14, 1928 4 Sheets-Sheet 3 Y Es Oct 27, 1931.

C. G. OLSON ROTARY CUTTING APPARATUS Filed Feb. 14. 1928 4 Sheets-Sheet 4 Patented @et 27, 1931 UNITED STATES PATENT OFFICE CARL G. OLSGN, E CHICAGO, ILLINOIS, ASSIGNOR T0 BEAKEPBOOF LOCK WASHER GOMPANY, 0F CHICAGO, ILLINOIS, A. CORPORATION 0F DELAWARE ROTARY CUTTING APPARATUS Applicationvle'd February 14, 1928. .KSeriaI No. 254,257.

My invention'relates to rbtry cuttin apparatus, and more particularly to mac ines provided with rotary dies for serrating or lanking material in strip form.

f In feeding material between rolls provided with peripheral cutters or dies, portions of the stock in some instances become lodged within the dies and must be forcibly ejected therefrom. It is an object of my invention l@ to provide means, including a rotary die, for

producing serrations in strip material, the serrated portions of the strip being positively ejected from the die by means operable in response to the cutting action of the die.

lef Another object of my invention is to prot9 ejecting the portions of the strips which have vide means including rotary dies for producing from a sin le strip of stock a plurality of strips having serrated margins and means associated with each of the dies for become lodged therein.`

A further object is to provide cooperating rotary dies for continuously severing fiat stock to form a plurality of strips with identical serrated margins and a plurality of radially positioned members operable in responce to the cutting action of the dies to eject the stock therefrom.

In addition to the above mentioned characteristics my invention further contemplates equipping rotary cutters or dies with a floating member which is adapted to eject stock at one portion of the die peripher in response to the cutting action of the die at the oppositely disposed portion of the periphery.

With the foregoing and other objects in view, which will appear in the following description, the invention resides in the novel combination and arrangement of parts and in the details of construction hereinafter described and claimed.

In the accompanying drawings:

Figure 1 is a central vertical sectional v iew of an apparatus embodying features of my invention taken on the line 1 1 of Figure 2.

Figure 2 is a vertical sectional lview of the apparatus taken on the line 2 2 of Figure 1.

Figure 3 is 'a fragmentary vertical sectional view taken on the line 3--3 of Figure 4 disclosing enlarged fragmentary upper and lower portions of each of the die rolls andthe ejector pins associated therewith.

Flgure 4 is a vertical section taken on the linge-4 of Fi ure 3.

lgure 5 is a ra enta ers ective view ofthe die rolls discglrdsed iilibiieraiive association with stock fed therebetween, portions of the upper die roll being shown in section to clearly illustrate the structural arrangement thereof, and,

Figure 6 is a fragmentary perspective view of a piece of stock in strip form showin the severing or shearing eect of the die ro ls.

Referring now to the drawings wherein like numerals have been employed to designate similar parts throughout the various figures, it will be observed that Figure 2 discloses a machine bed 1, which supports suitable side frames 2 and 3 extending upwardly therefrom, Figure 1. Vertically slidable between the frames 2 and 3 are a pair of spaced journal boxes 5 and 6 and these boxes 5 and 6 serve as bearings for a horizontal shaft 7. The journal boxes 5 and 6 are supported at the upper ends of heavy duty coiled springs 9 and 10 respectively, which rest upon bearings 12 and 13. rIhese bearings 12 and 13 are supported by the machine bed 1 and journaled in these bearings is a shaft 14. Interposed between the journal boxes and bearings 5 and 6 and keyed to the shaft 7 is a rotary die unit indicated generally by the numeral 16 and a similar unit 17 is keyed in reversed position upon the shaft 14 between the bearings 12 and 13. The vertical position of the die unit 16 with respect to its companion or complementary unit may be adjusted by means of suitable adjusting screws 18 which are threaded within an upper frame plate 20 secured to the upper ends of the side frames 2 and 3 by means of bolts 21, Figure 1. By threading the screws 18 downwardly the die unit 16 will be moved into closer association with the companion unit 17. The die units 16 and 17 will rotate in response to the rotation of their respective shafts 7 and 14 and in order to clearly understand their operative characteristics these units will now be described in detail.

As hereinbefore mentioned, the die units 16 and 17 are identical in construction and the only difference in their operation resides in the fact' that the unit on one of the shafts I type of tightening wrench. Each of the die rolls 27 included within the units 16 and 17 is formedjwith a plurality of radial slots 29.l

Y- Figures 3 and 5, and it is to be understood that radial sections 31 presented between each 20 of the above mentioned radial slots 29 form the maleV die sections of the roll 27. In other words, 'theperipheral surface of each of the radial sections 31 serves as a punching sur- -face to engage a strip of stock 32 fed between the rolls 27 Referring to Figures 3 and 4, it is to' be noted that the radial sections 31 in the upper: die unit 16 cooperate with the slots 29 of: the lower die unit 17 and likewise the -v radial sections 31 of the unit 17 cooperate with the radial slots 29 of the unit 16 to split the strip 32 into strip portions 34 and 35, Figures 5 and 6, and to simultaneously produce complementary marginal serrations in. each-of the strips 34 and 35. Thus the radial .Y 35`sections 31 of one die unit present male die portions for cooperation with the radial slots of the other die unit, said radial slots serving A v asl female die sections. From the foregoing it will be understood that marginal projections 4 36 of the strip portion 34, Figures 5 and 6, which are blanked or severed from the main strip 32, `will be forced upwardly into the A radial slots or die sections 29 of the upper die unit 16, and similar marginal projections i457 36 of the strip portion 35 will be forced downwardly into the radial slots 29 of the lower Adie unit 17 through the action of the male die -sections 31 of the upper unit. Thus as the f unitary strip 32 is fed between the die rolls Y 59 27 the serrated section 34 will be carriedl along the periphery of the upper die roll and the serrated section 35 will be carried along the periphery of the lower vdie roll, as clearly shown in Figures 1 and 5. Y Slidably mounted within each of the radial A female die sections or slots 29 of the rolls 27 is an ejector or shedder pin 38. These ejector pins are secured against outward dislodgement by means of a shoulder 39. Figures 4 Yand 5, formed at the inner extremity thereof. These pins terminate within a recess or annular chamber 40 formed within the body of each ofthe die rolls 27. Floating within each of these chambers 40 i's'an annulus 42.

This annulus is partially lodged within a portion of the die holder 23 as well as in the annular chamber 40 and it will be noted that Ilthe annulus is loosely mounted or rotatable within the die holder 23. ,In other words,

the annulus 42 is notvonly free to rotate within the die holder 23 and within the chamber 40, but may also be moved laterally in response to pressure exerted by the ejector pins against the lateral surface of the annulus. Thus, as clearly shown in Figures 1, 3 and 4,

' when the strip 32 is fed between the die units j The engagement of the ejector pins with the 'annulus 40 in the 'upper die unit 16 causes said annulus to be shifted upwardly, as clearly shown, with the result that certain of the ejector pins positioned diametrically opposite from the ejector pins just mentioned will be shifted outwardly. By shifting these ejector pins outwardly, portions of the serrated strip section 34 will be dislodged or loosened from the slots 29 as clearly shown in Figures 3 and 4. Similarly as certain of the ejector pins 38 Within the die unit 17 are shifted inwardly in response to the shearing action of the dies, the annulus within said unit will be urged downwardly, thereby causing certain of the oppositely disposed ejector pins to be moved radially outward. The outward movement of these pins causes the portions of the serrated strlp section 35 to be released in the manner just described in connection with the releasing of the strip section 34. From the foregoing it will be understood that a strip of material may be continuously fed between the die units 16 and 17, severed into a plurality of strip sections, and these strip sections positively ejected from the dies, in response to the cutting action thereof, thereby rendering possible the continuous withdrawal of the severed strips from each of the die units. Obviously the invention is not limited to the formation of any particular type of serration or cut, but contemplates the application of the described ejector means for use in connection with varied forms of blanking operations.

Rotation may be imparted to the shaft 14 through the agency of suitable gears 43 and 44 connected to any suitable source of power not shown. One extremity of the shaft 14 carries atapered gear 46, Figure 2, which 'meshes with a companion tapered gear 47 keyed to a reduced portion of the shaft 7. By shifting either of the gears axially on their respective shafts an adjustment may be readily effected to account for any wear to which the gears might be subjected or a variation 1n the distance between the axes thereof whiclrmight be desired. A plurality/- of s'hims 49,.are mounted upon the shaft 14 adjacent the gear 46 and the number of shims may be varied in accordance with the degree of axial shifting of the gear 46 which may be desired. 'Likewise a plurality of similar shims Ofa're mounted upon the shaft 7 adj acent the gear 47 which are adapted to function similarly tothe shims 49. Suitable bolts 51 4and 52, igure 2, may be employed to securefthe gears 46 and 47 respectively in proper :axial positions.

In the operation of the described apparatus rotation is imparted to the die units 16 .and 17 in the directions indicated by the arj rowsinv Figure 1 through the medium of the gears 43, 44, 46 and 47. Strip material 32 may be fed between the die rolls 27 and in this connection it will be observed that these die rolls are each formed with shoulders or flanges 54 which serve as lateral guides for operation between the radial male die sections 31 of each of the rolls and the radial female die sections or slots 29 alternate portions of the sheared strip are forced upwardly into the radial slots of the upper die roll and downwardly into the slots29 of the lower die roll, Figure 3. Each of the strip sections 34 and 35 is thus carried by the periphery of the upper and lower die rolls respectively and as these strip sections 34 and 35 are carried to a position oppositely disposed from the position at which the shearing operation took place, certain of the pins 38 will oe moved outwardly so as to positively eject the portions of the strip sec- \tions lodged within the slots. This ejecting action ofthe pins 38 takes place in response to the cutting or shearing action of the die rolls which causes the annulus 42 within each of the chambers 40 to be shifted.

From the foregoing it will be clear that my invention provides a very durable and compact apparatus which will serve to eXpeditiously cut or shear strip material, and further supplies means in association with the die rolls thereof to positively and continuously eject the advancing stock. By having the ejecting mechanism' operable in response to the cutting action of the die rolls in the mannerdescribed, a novel and eiliciently operable arrangement of cooperating elements is presented and it will be apparent that each of the die units is so constructed that die rolls for producing varied cuts or blanking operations may be readily interchanged. Likewise various types of cylindrical die units similar to the units 16 and 17 may be employed without departing from the spirit and scope of my invention and by having the tapered gear arrangement adjustments may be easily made to meet conditions incident to the use of the cutting machines embodying my invention. It is to be further observed that the described apparatus cuts or shears strip material in accordance with a desired design without wasting any of the stock. In other words, material such as the unitary strip 32 may be fed between the die units and formed into individual strips having complimentary marginal formations of predetermined design without necessitating the scrapping of any of the material as it is continuously fed between and ejected from the die peripheries.

My invention has herein been described in connection with the shearing of a strip of material and the producing of particular forms of serrations with a particular die unit, but it will be apparent that the inven tion is capable of application in instances where different forms of shearing or blanlr ing operatings are desired, and therefore should be limited only by the scope of the appended claims.

Having` thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In material forming apparatus of the class described, having cooperating rotary die units adapted to sever material delivered therebetween longitudinally, one of the severed portions being carried and advanced by one die unit and another of the severed portions being carried and advanced by another of the die units, and shiftable means carried by the die units for automatically shedding the severed portions of the material advanced by each unit.

2. In a material configurating machine of the class described lia-ving cooperating rotary die units for receiving work fed therebetween, a male die member in each of the units, a female die section in each of the units, the male member in one unit cooperating with the female sections in the other unit to configurate material fed thereto, and means carried by each die unit operable in response to the co-action between the male die members and female die sections to eject coniigurated material from the die units.

3. In a material conigurating machine of the class described having cooperating rotary die units for receiving material fed therebetween, a plurality of slidable ejector elements in each of the die units adapted to be moved in response to the configurating action of the die units, and means associated with each die unit for operatively connecting certain of the ejector elements in each die unit to cause the ejection of material from said units.

4. In material working apparatus of the class described, a frame, detachable rotary die units slidably mounted in spaced relation within the frame, and a pair of meshing Atapered gears for rotating the die units, said gears being axially adjustable in accordance -with the spaced relation of the axes of the rota units.

5. n material working apparatus of the class described,v a frame,A a rotary shaft mounted within the frame, another rotary shaft positioned above the .first shaft, resil ient means interposed between said shafts, cooperating die units carried by the shafts, and a pair of tapered gears connecting the shafts, said gears being axially adjustable upon their respective shafts.

6. In apparatus of the class described, a pair of cooperating rota-ry die units for receiving material fed therebetween comprised of a plurality of peripheral lfemale die sections, a plurality of ejector elements which are slidably mounted within each of said female die sections, and a male die section interposed between the adjacent female sections, the male die section of one unit being adapted to effect the movement of a complementary ejector element in the other unit during operative engagement of said male die section with the material.

In witness whereof, l have hereunto sub@V scribed my name.,

CARL G. oLsoNl 

